Perhaps you should try some spelling variations:
transfer integration » transport integration, transfer integrated, transfer intervention
developpement en » developpement et, developpement des, developpement de
2 communication » 3 communication, 4 communication, 1 communication
4 developpement » de developpement, le developpement, et developpement
3 trade » 1 trade, 4 trade, 2 trade
trade 2 » trade _, trade a, trade 4
costs 4 » costs _, costs a, costs 4.2

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology transfer integration 3 trade 2 communication costs 4 developpement en afrique.*.